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signal processing device

A signal processing device and signal technology, applied in the direction of speaker distribution signal, electrical components, frequency response correction, etc., to achieve the effect of reducing inappropriate phenomena

Active Publication Date: 2020-12-25
SOCIONEXT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the crosstalk canceling process described in Patent Document 1 has a problem in an asymmetrical acoustic space, that is, it is inappropriate to hear a sound louder than the original intended sound.

Method used

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Examples

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Embodiment approach 1

[0065] figure 1 A configuration example of the signal processing device 1 in this embodiment, a speaker, and a listener 100 are shown. In this figure, the signal processing device 1 includes a control unit 103 , a crosstalk canceller 110 , an input unit 120 , an output unit 121 , and an output unit 122 . The signal processing device 1 processes the audio signal input from the input unit 120 by using the crosstalk canceller 110 or the like under the control of the control unit 103 , and outputs the output sound for output from the left speaker 111 from the output unit 121 . The signal is an output audio signal for output from the right speaker 112 from the output unit 122 , and both the speaker 111 and the speaker 112 are located outside the signal processing device 1 .

[0066] Here, the control unit 103 controls the crosstalk canceller 110, the output unit 121, and the output unit 122 so that the sound signal A to be reproduced is input, and only the sound reaches the left e...

Embodiment approach 2

[0086] As in Embodiment 1 Figure 2C As shown, in the acoustic characteristics actually measured, not only |GRR||GLR| are included.

[0087] In this case, if figure 1 It can be seen that the gain |XC| of the crosstalk canceller 110 becomes greater than 1 at frequencies satisfying |GRR|>|GLR| by (Equation 5).

[0088] XC=-GRR / GLR...(Formula 5)

[0089] exist Figure 2C In the frequency band above 5 kHz, although there are many frequencies where |XC|>1 is included, this is because the corresponding frequency is |GRR|>|GLR|.

[0090] Therefore, by Figure 3A The composition shown, to achieve the most appropriate control. Figure 3A A configuration example of the signal processing device 3 in Embodiment 2, speakers 111 and 112 and a listener 100 are shown. exist Figure 3A Among them, the respective input signals of speakers 111 and 112 are processed by crosstalk cancellers 201 and 202 . Let the transfer functions of the crosstalk cancellers 201 and 202 be XCL and XCR, res...

Embodiment approach 3

[0109] The control device described so far is used to process the input signal with the designed crosstalk canceller, and reproduce and control it through the speaker. It is also effective to use the device and reproduce the processed signal according to the reproduction needs.

[0110] Figure 7 Its block diagram is shown. Figure 7 A configuration example of the signal processing device 7 in Embodiment 3, speakers 111 and 112 , and a listener 100 are shown. The audio signal A is signal-processed by the crosstalk cancellers 201 (XCL) and 202 (XCR) designed by the method described above, and is recorded in the recording device 701 as an output signal. The output signal recorded on the recording device 701 is read from the recording device 701 at a predetermined timing, and reproduced by the left speaker 111 and the right speaker 112 . The playback timing can be set using, for example, an event such as a user operation or a time stamp as a trigger.

[0111] Here, the genera...

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Abstract

The signal processing device performs crosstalk cancellation processing on input audio signals in an asymmetrical acoustic space where two speakers on the X side and the Y side (X is left and right, and Y is the other left and right) are arranged. , having a control section that controls the output from the two speakers so that the sound signal is substantially canceled at the listener's Y side ear, the transfer function between the Y side speaker and the Y side ear GYY, the transfer function between the speaker on the X side and the ear on the Y side is GXY, and the transfer function obtained by dividing GYY by GXY is GCY, the control unit (103) controls so that the An audio signal is output from the speaker on the Y side, and a signal obtained by processing the audio signal with the transfer function GCY is output from the speaker on the X side.

Description

technical field [0001] The present application relates to a signal processing device equipped with a crosstalk canceller. Background technique [0002] Multi-channel audio signals such as 5.1ch or 7.1ch are not only used in movies or music, but also in the field of games. When reproduction is performed by multi-channel speakers arranged at predetermined positions surrounding the listener, audio reproduction with a sense of presence is realized. However, it is difficult to install 5.1ch or 7.1ch multi-channel speakers in general households due to the problem of the place. Therefore, a 3D sound technology has been developed that uses conventional stereo speakers to simulate the same effect as multi-channel audio reproduction. [0003] For example, Patent Document 1 discloses a sound image localization device that localizes a sound image to an arbitrary position through stereo field processing. Furthermore, Patent Document 2 discloses an audio signal reproduction device that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S1/00
CPCH04S1/00H04R3/04H04R3/14
Inventor 阿部一任宫阪修二
Owner SOCIONEXT INC
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